Recoilless rifle with an under-barrel 5.56mm carbine.
Developed by Bofors in the late 1960s, intended to be deployed on the squad level.
This weapon was killed off by Bofors early in testing, never even made it to military trials.

Experimental Swedish 45mm recoilless gun with an underslung 5.56 carbine.
Intended as a squad level weapon carried by grenadiers, the weapon was woefully unsuccessful during testing.
The program was scrapped due to unfixable issues attributed to the weapon being impractical and based on flawed concepts.